共查询到20条相似文献,搜索用时 109 毫秒
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CoherenceTimeMeasurementofPicosecondPulsesUsingReverseSaturableAbsorptioninLeadPhthalocyanineLIFengSONGYinglinYANGKunLUIShuti... 相似文献
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Direct Generation of Tunable UV Picosecond Laser Pulses Using Spectrotemporal Selection 总被引:1,自引:1,他引:0
Nguyen Dai Hung) Yusaburo Segawa 《Chinese Journal of Lasers》1997,6(3):198-206
DirectGenerationofTunableUVPicosecondLaserPulsesUsingSpectrotemporalSelectionNguyenDaiHung1)YusaburoSegawa(PhotodynamicResea... 相似文献
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QU Junle NIU Hanben 《Chinese Journal of Lasers》1998,7(2):120-125
ASoftX┐rayStreakCamerawithSlitLengthof30mmQUJunleNIUHanben(XianInstituteofOpticsandPrecisionMechanics,ChineseAcademyofScienc... 相似文献
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Surface temperature field survey for laser heating of steels 总被引:2,自引:0,他引:2
Surfacetemperaturefieldsurveyforlaserheatingofsteels¥ZHUZuchang;LIXiuqian;YUShaoluo(ShanghaiUniversityofEngineeringScience,Sh... 相似文献
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TheoryofdischargesectionalizedalongagasflowCHENTao;QIUJunlin(LaserInstituteofHuazhongUniversityofScience&Technology,mahan4300... 相似文献
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PedestalMeasurementofLaserPulsesWANGYiminZHANGZhengquanXUZhizhan(ShanghaiInstituteofOptics&FineMechanics,ChineseAcademyofScie... 相似文献
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HUANG Feiran WEI Zhiyi YANG JieZHOU Jianyin YU Zhenxin 《Chinese Journal of Lasers》1997,6(4):337-341
PropertiesofLBOandGenerationofMode┐lockingBlueFemtosecondPulsesHUANGFeiranWEIZhiyiYANGJieZHOUJianyinYUZhenxin(StateKeyLabora... 相似文献
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TheHardnessPropertiesofCarbonSteelsAfterLaserProcessing¥ZHUZuchang;WANGWeixiang;LIXiuqian;YUShaoluo(ShanghaiUniversityofEngin... 相似文献
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LIZun-ying SONGYi-zhong 《原子与分子物理学报》2001,18(3):265-268,272
1 INTROEXPERIMENTExperimentalsetupwasshowninFig .1,exhaustivedescriptionsonthesetupandtheprocessofacquiringdatahasalready giveninrelativedocument[1] ,nowwedoexcessivedescriptionnolonger .2 RESULTANDDISCUSSIONResult:earlierspectraoftheplasmaradiatingwereshow… 相似文献
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LI Xuexin LIU Yaqing ZHAI KanXU Zhizhan HAN Shensheng 《Chinese Journal of Lasers》1997,6(6):539-542
EfectsofPulseDurationsonHighorderHarmonicGenerationLIXuexinLIUYaqingZHAIKanXUZhizhanHANShensheng(ShanghaiInstituteofOpticsan... 相似文献
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用偏振和有规位相分布抑制线聚焦系统的小尺度不均匀性 总被引:2,自引:0,他引:2
研究了一种用以抑制光楔列线聚焦系统在靶面产生的干涉尖端的方法。由这种尖峰引起的小尺度不均匀性对X射线激光的产生是不利的。利用特殊分布的偏振态和位相,可把尖峰引向更密度伯程度,而且其对比度下降,这将有利于它通过靶物质自身的横向热传导而平滑化。对于四单元的列阵系统,甚至可将尖峰完全消除。 相似文献
14.
Asundi A 《Optics letters》2000,25(4):218-220
Speckles usually are of two kinds: laser speckle and white-light speckle. An additional kind, termed a sampled speckle, is proposed. Whereas laser speckles arise from multiple interference of light scattered from an object illuminated by a coherent laser beam and white-light speckles are a physically generated speckle pattern on the surface of the object, sampled speckles are generated as a result of the sampling of a digital image. The generation of these speckles and their application to displacement measurement are demonstrated. 相似文献
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为了检测列阵式靶面均匀照明光学系统聚焦特性,成功地开发了测定微米量级光强度起伏干涉斑纹投影放大的新技术。报道了测定聚焦不斑一维,二维大尺度不均匀性小尺度干涉斑纹的实验方法,结果及误差分析。 相似文献
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This paper investigates, experimentally, the dynamic properties of triply-scattered speckled speckles and their application to the velocity measurement of a moving diffuse object, which is behind a transparent diffuse screen. The comparison between triply-scattered speckled speckles and singly-scattered normal speckles shows that the triply-scattered speckle pattern has a high degree of randomness in the spatial domain and that its time-varying intensity fluctuations have a rate 72 times that of the normal speckle case in the temporal domain. Consequently, a velocimeter using the triply-scattered speckles can measure the object velocity with a greatly reduced measuring time than when using normal speckles. 相似文献
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The relation between the velocity of a moving diffuse object and the mean number of integrated speckles in the certain time interval at the far-field plane of the object is obtained. By using this relation based on the first order statistics of integrated speckles, a new method of measuring the velocity of the diffuse object is proposed and experimentally verified. The first order probability density function of time-integrated speckles is also studied from which the validity of the present method is verified. 相似文献
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The statistical analysis of self-mixing speckles interference using Fabry-Perot cavity is described based on the theory of the speckle and the self-mixing interference in a laser diode. Speckle signal processing based on Fourier transform is presented in this paper. The linear dependence between the spectrum mean frequency and velocity of solution is given by simulation and proved by experiment. The experimental results show that this speckle signal processing can be used to measure velocity of target. 相似文献
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由散斑场和参考光的干涉图样提取散斑场复振幅、相位和强度的数值分布,并对其统计特性进行实验研究,消除了散斑场强度统计函数特别是概率密度函数的传统测量方法中噪声引起的偏差,并实现了散斑场复振幅和相位统计特性的实验研究.通过对不同散射角处散斑场的研究发现随着散射角度的增大散斑颗粒逐渐呈现出横向展宽的现象,且其平均宽度表现为各向异性,但是其概率密度函数并没有发生变化,与小角度情况一样属于圆形高斯散斑场.
关键词:
散斑
概率密度
干涉 相似文献